contract-testing

Consumer-driven contract testing prevents breaking changes in microservices APIs by validating interactions from the consumer's perspective. It automatically detects incompatible modifications and recommends semantic versioning to maintain backward compatibility during integration.

Consumer-driven contract testing using Pact is a method where consumers define expected API interactions as contracts. Providers are then verified against these contracts to ensure they fulfill the agreed-upon expectations, preventing integration failures in distributed systems.

You verify a provider by running provider verification against all defined consumer contracts for the target service. This process checks that the API provider fulfills every contract from its consumers, detecting any breaking changes before release.

Yes, contract testing recommends semantic version bumps based on detected API changes. By analyzing contract verification results, it identifies breaking changes and advises the appropriate version increment to maintain backward compatibility for your microservices.

Contract testing works effectively for detecting breaking changes in distributed systems by validating API contracts between microservices. It ensures providers meet consumer expectations, flagging incompatible modifications that could cause unexpected integration failures across services.

You need contract testing for API integration when developing new versions of microservices to ensure changes do not break existing consumers. It is essential for maintaining backward compatibility and preventing integration issues in distributed systems with multiple interacting services.